im not really into the dubstep but from a technical standpoint i guess it could do with a bit of phatness to the drums, the highs were really crisp and nicely audible, but really lacked a lower punch, where i would assume the deep kick drum would be a driving force in dubstep (??)
the bassline was alright although a bit odd of a melody i guess, a bit grating after a while if you know what i mean, that could be because of the key or the progression, maybe make it a bit more grittier, and interesting, maybe just tweak the lfo so its fully wet, if you know what i mean, instead of loose..
thing is i have here hand writed wobbles . and i dont want to make it tight, i like it loose more (i tryed non- loose system too)
also you could lightly sidechain it to make the kick drum have more impact.